FIELD: hoist equipment. SUBSTANCE: cabin has an acoustically transparent false panel which forms a false ceiling. The space between the false ceiling and a ceiling is filled with a fibrous noise-absorbing material. A fan is mounted in a box between diaphragms on the side of the suction and exhaust which form chambers of abrupt expansion with misaligned holes at the inlet and outlet. EFFECT: improved structure. 2 cl, 3 dwg
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Authors
Dates
1994-02-15—Published
1991-06-28—Filed